java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-new/gauss_sum.i.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:15:50,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:15:50,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:15:50,514 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:15:50,515 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:15:50,517 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:15:50,520 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:15:50,529 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:15:50,532 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:15:50,533 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:15:50,535 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:15:50,536 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:15:50,538 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:15:50,539 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:15:50,542 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:15:50,544 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:15:50,545 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:15:50,547 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:15:50,548 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:15:50,553 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:15:50,557 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:15:50,558 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:15:50,559 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:15:50,561 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:15:50,564 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:15:50,576 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:15:50,578 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:15:50,580 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:15:50,581 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 23:15:50,602 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:15:50,602 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:15:50,604 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:15:50,604 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:15:50,605 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:15:50,605 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:15:50,605 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:15:50,605 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:15:50,605 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:15:50,606 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:15:50,607 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:15:50,607 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:15:50,607 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:15:50,607 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:15:50,608 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:15:50,608 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:15:50,608 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:15:50,608 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:15:50,608 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:15:50,609 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:15:50,609 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:15:50,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:15:50,609 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:15:50,609 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:15:50,610 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:15:50,610 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:15:50,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:15:50,610 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:15:50,610 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:15:50,930 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:15:50,952 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:15:50,956 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:15:50,957 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:15:50,957 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:15:50,958 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i.p+cfa-reducer.c [2019-10-14 23:15:51,031 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52e7e8fe0/f6cd05caf84e4e519c69b79bb26e0f4c/FLAGe1606367d [2019-10-14 23:15:51,509 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:15:51,510 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.p+cfa-reducer.c [2019-10-14 23:15:51,517 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52e7e8fe0/f6cd05caf84e4e519c69b79bb26e0f4c/FLAGe1606367d [2019-10-14 23:15:51,917 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52e7e8fe0/f6cd05caf84e4e519c69b79bb26e0f4c [2019-10-14 23:15:51,928 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:15:51,930 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:15:51,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:15:51,932 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:15:51,935 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:15:51,936 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:15:51" (1/1) ... [2019-10-14 23:15:51,938 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47ae0c4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:51, skipping insertion in model container [2019-10-14 23:15:51,939 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:15:51" (1/1) ... [2019-10-14 23:15:51,946 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:15:51,968 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:15:52,135 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:15:52,148 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:15:52,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:15:52,189 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:15:52,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:52 WrapperNode [2019-10-14 23:15:52,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:15:52,190 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:15:52,191 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:15:52,191 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:15:52,278 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:52" (1/1) ... [2019-10-14 23:15:52,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:52" (1/1) ... [2019-10-14 23:15:52,283 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:52" (1/1) ... [2019-10-14 23:15:52,283 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:52" (1/1) ... [2019-10-14 23:15:52,288 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:52" (1/1) ... [2019-10-14 23:15:52,290 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:52" (1/1) ... [2019-10-14 23:15:52,291 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:52" (1/1) ... [2019-10-14 23:15:52,292 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:15:52,293 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:15:52,293 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:15:52,293 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:15:52,294 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:15:52,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:15:52,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:15:52,357 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:15:52,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:15:52,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 23:15:52,358 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:15:52,358 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:15:52,358 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:15:52,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:15:52,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:15:52,518 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:15:52,518 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-10-14 23:15:52,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:15:52 BoogieIcfgContainer [2019-10-14 23:15:52,520 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:15:52,521 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:15:52,521 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:15:52,524 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:15:52,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:15:51" (1/3) ... [2019-10-14 23:15:52,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69699648 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:15:52, skipping insertion in model container [2019-10-14 23:15:52,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:52" (2/3) ... [2019-10-14 23:15:52,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69699648 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:15:52, skipping insertion in model container [2019-10-14 23:15:52,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:15:52" (3/3) ... [2019-10-14 23:15:52,528 INFO L109 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.p+cfa-reducer.c [2019-10-14 23:15:52,539 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:15:52,550 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:15:52,563 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:15:52,604 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:15:52,604 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:15:52,604 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:15:52,606 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:15:52,606 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:15:52,606 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:15:52,607 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:15:52,607 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:15:52,628 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-10-14 23:15:52,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-14 23:15:52,633 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:52,634 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:52,635 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:52,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:52,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1277702393, now seen corresponding path program 1 times [2019-10-14 23:15:52,646 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:52,646 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087988072] [2019-10-14 23:15:52,647 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:52,647 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:52,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:52,723 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:52,724 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1033628675] [2019-10-14 23:15:52,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:52,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:52,796 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:15:52,806 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:52,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:52,892 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087988072] [2019-10-14 23:15:52,893 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:52,894 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033628675] [2019-10-14 23:15:52,895 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:15:52,895 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:15:52,896 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988009027] [2019-10-14 23:15:52,903 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:15:52,904 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:52,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:15:52,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:15:52,918 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2019-10-14 23:15:52,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:52,974 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2019-10-14 23:15:52,974 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:15:52,976 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-14 23:15:52,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:52,984 INFO L225 Difference]: With dead ends: 26 [2019-10-14 23:15:52,985 INFO L226 Difference]: Without dead ends: 13 [2019-10-14 23:15:52,988 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:15:53,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-10-14 23:15:53,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-10-14 23:15:53,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-10-14 23:15:53,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-10-14 23:15:53,025 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-10-14 23:15:53,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:53,026 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-10-14 23:15:53,026 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:15:53,026 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-10-14 23:15:53,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-14 23:15:53,027 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:53,027 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:53,228 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:53,229 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:53,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:53,230 INFO L82 PathProgramCache]: Analyzing trace with hash -954130992, now seen corresponding path program 1 times [2019-10-14 23:15:53,230 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:53,231 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304837999] [2019-10-14 23:15:53,231 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:53,232 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:53,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:53,246 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:53,246 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1294049441] [2019-10-14 23:15:53,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:53,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:53,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 23:15:53,287 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:53,356 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:53,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:53,375 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304837999] [2019-10-14 23:15:53,375 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:53,376 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294049441] [2019-10-14 23:15:53,376 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:53,376 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-14 23:15:53,376 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657380526] [2019-10-14 23:15:53,378 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:15:53,379 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:53,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:15:53,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:15:53,380 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2019-10-14 23:15:53,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:53,435 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2019-10-14 23:15:53,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:15:53,436 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-10-14 23:15:53,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:53,437 INFO L225 Difference]: With dead ends: 17 [2019-10-14 23:15:53,437 INFO L226 Difference]: Without dead ends: 14 [2019-10-14 23:15:53,438 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:15:53,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-10-14 23:15:53,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-10-14 23:15:53,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-14 23:15:53,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-10-14 23:15:53,444 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-10-14 23:15:53,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:53,444 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-10-14 23:15:53,444 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:15:53,444 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-10-14 23:15:53,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-14 23:15:53,445 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:53,445 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:53,656 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:53,656 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:53,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:53,657 INFO L82 PathProgramCache]: Analyzing trace with hash 486647847, now seen corresponding path program 2 times [2019-10-14 23:15:53,658 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:53,659 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541387936] [2019-10-14 23:15:53,659 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:53,659 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:53,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:53,689 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:53,689 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [40836790] [2019-10-14 23:15:53,689 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:53,735 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:15:53,735 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:53,737 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-14 23:15:53,739 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:53,795 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:53,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:53,811 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541387936] [2019-10-14 23:15:53,812 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:53,812 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40836790] [2019-10-14 23:15:53,812 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:53,812 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-14 23:15:53,813 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645732569] [2019-10-14 23:15:53,814 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:15:53,814 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:53,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:15:53,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:15:53,815 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2019-10-14 23:15:53,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:53,866 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-10-14 23:15:53,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:15:53,867 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-10-14 23:15:53,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:53,868 INFO L225 Difference]: With dead ends: 18 [2019-10-14 23:15:53,868 INFO L226 Difference]: Without dead ends: 15 [2019-10-14 23:15:53,869 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:15:53,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-14 23:15:53,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-10-14 23:15:53,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-14 23:15:53,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-10-14 23:15:53,874 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2019-10-14 23:15:53,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:53,874 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-10-14 23:15:53,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:15:53,874 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-10-14 23:15:53,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-14 23:15:53,875 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:53,875 INFO L380 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:54,076 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:54,081 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:54,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:54,082 INFO L82 PathProgramCache]: Analyzing trace with hash -2093848400, now seen corresponding path program 3 times [2019-10-14 23:15:54,082 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:54,083 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147303756] [2019-10-14 23:15:54,083 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:54,083 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:54,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:54,100 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:54,100 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [141458667] [2019-10-14 23:15:54,101 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:54,141 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 23:15:54,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:54,143 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 23:15:54,145 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:54,224 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:54,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:54,241 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147303756] [2019-10-14 23:15:54,242 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:54,242 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141458667] [2019-10-14 23:15:54,242 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:54,243 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 23:15:54,243 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772799264] [2019-10-14 23:15:54,243 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:15:54,244 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:54,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:15:54,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:15:54,245 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 7 states. [2019-10-14 23:15:54,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:54,319 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-10-14 23:15:54,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:15:54,320 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2019-10-14 23:15:54,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:54,321 INFO L225 Difference]: With dead ends: 19 [2019-10-14 23:15:54,321 INFO L226 Difference]: Without dead ends: 16 [2019-10-14 23:15:54,321 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:15:54,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-14 23:15:54,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-10-14 23:15:54,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-14 23:15:54,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-10-14 23:15:54,326 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2019-10-14 23:15:54,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:54,326 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-10-14 23:15:54,326 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:15:54,327 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-10-14 23:15:54,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 23:15:54,327 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:54,327 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:54,536 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:54,537 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:54,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:54,538 INFO L82 PathProgramCache]: Analyzing trace with hash -484853433, now seen corresponding path program 4 times [2019-10-14 23:15:54,538 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:54,539 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607009723] [2019-10-14 23:15:54,539 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:54,539 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:54,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:54,549 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:54,550 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2118798387] [2019-10-14 23:15:54,550 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:54,609 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:15:54,609 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:54,611 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-14 23:15:54,612 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:54,672 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:54,685 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:54,686 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607009723] [2019-10-14 23:15:54,686 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:54,686 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118798387] [2019-10-14 23:15:54,687 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:54,687 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-14 23:15:54,687 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413377132] [2019-10-14 23:15:54,687 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 23:15:54,688 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:54,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 23:15:54,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:15:54,689 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 8 states. [2019-10-14 23:15:54,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:54,749 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-10-14 23:15:54,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 23:15:54,750 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-10-14 23:15:54,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:54,751 INFO L225 Difference]: With dead ends: 20 [2019-10-14 23:15:54,751 INFO L226 Difference]: Without dead ends: 17 [2019-10-14 23:15:54,751 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:15:54,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-14 23:15:54,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-14 23:15:54,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-14 23:15:54,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-10-14 23:15:54,756 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2019-10-14 23:15:54,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:54,757 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-10-14 23:15:54,757 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 23:15:54,757 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-10-14 23:15:54,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 23:15:54,758 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:54,758 INFO L380 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:54,963 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:54,963 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:54,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:54,964 INFO L82 PathProgramCache]: Analyzing trace with hash -2145617008, now seen corresponding path program 5 times [2019-10-14 23:15:54,964 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:54,964 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326921862] [2019-10-14 23:15:54,964 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:54,964 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:54,965 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:54,978 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:54,979 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1843222760] [2019-10-14 23:15:54,979 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:55,013 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-14 23:15:55,014 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:55,015 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-14 23:15:55,017 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:55,090 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:55,105 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:55,105 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326921862] [2019-10-14 23:15:55,105 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:55,106 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843222760] [2019-10-14 23:15:55,106 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:55,106 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 23:15:55,106 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076423767] [2019-10-14 23:15:55,107 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:15:55,107 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:55,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:15:55,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:15:55,108 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2019-10-14 23:15:55,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:55,188 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2019-10-14 23:15:55,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:15:55,188 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2019-10-14 23:15:55,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:55,189 INFO L225 Difference]: With dead ends: 21 [2019-10-14 23:15:55,189 INFO L226 Difference]: Without dead ends: 18 [2019-10-14 23:15:55,190 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:15:55,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-10-14 23:15:55,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-10-14 23:15:55,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-14 23:15:55,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-10-14 23:15:55,194 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2019-10-14 23:15:55,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:55,194 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-10-14 23:15:55,195 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:15:55,195 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-10-14 23:15:55,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 23:15:55,195 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:55,196 INFO L380 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:55,396 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:55,396 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:55,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:55,397 INFO L82 PathProgramCache]: Analyzing trace with hash -2089680281, now seen corresponding path program 6 times [2019-10-14 23:15:55,397 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:55,397 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766557196] [2019-10-14 23:15:55,397 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:55,398 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:55,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:55,416 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:55,416 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [988503130] [2019-10-14 23:15:55,416 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:55,454 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-14 23:15:55,454 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:55,456 WARN L254 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 35 conjunts are in the unsatisfiable core [2019-10-14 23:15:55,457 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:55,546 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:55,568 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:55,569 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766557196] [2019-10-14 23:15:55,569 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:55,569 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988503130] [2019-10-14 23:15:55,569 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:55,569 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 23:15:55,570 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212313618] [2019-10-14 23:15:55,570 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:15:55,570 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:55,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:15:55,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:15:55,571 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 10 states. [2019-10-14 23:15:55,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:55,655 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2019-10-14 23:15:55,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:15:55,655 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-10-14 23:15:55,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:55,656 INFO L225 Difference]: With dead ends: 22 [2019-10-14 23:15:55,656 INFO L226 Difference]: Without dead ends: 19 [2019-10-14 23:15:55,657 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:15:55,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-14 23:15:55,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-14 23:15:55,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-14 23:15:55,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-10-14 23:15:55,664 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2019-10-14 23:15:55,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:55,664 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-10-14 23:15:55,665 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:15:55,665 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-10-14 23:15:55,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 23:15:55,666 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:55,667 INFO L380 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:55,878 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:55,878 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:55,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:55,879 INFO L82 PathProgramCache]: Analyzing trace with hash -355641744, now seen corresponding path program 7 times [2019-10-14 23:15:55,880 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:55,880 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34783378] [2019-10-14 23:15:55,880 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:55,881 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:55,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:55,896 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:55,897 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [863747847] [2019-10-14 23:15:55,897 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:55,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:55,933 WARN L254 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 39 conjunts are in the unsatisfiable core [2019-10-14 23:15:55,935 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:56,043 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:56,060 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:56,061 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34783378] [2019-10-14 23:15:56,061 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:56,061 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863747847] [2019-10-14 23:15:56,061 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:56,062 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-10-14 23:15:56,062 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278550073] [2019-10-14 23:15:56,063 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 23:15:56,063 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:56,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 23:15:56,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:15:56,064 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 11 states. [2019-10-14 23:15:56,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:56,188 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2019-10-14 23:15:56,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:15:56,188 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2019-10-14 23:15:56,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:56,189 INFO L225 Difference]: With dead ends: 23 [2019-10-14 23:15:56,190 INFO L226 Difference]: Without dead ends: 20 [2019-10-14 23:15:56,190 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:15:56,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-14 23:15:56,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-14 23:15:56,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-14 23:15:56,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-10-14 23:15:56,196 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2019-10-14 23:15:56,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:56,196 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-10-14 23:15:56,196 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 23:15:56,197 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-10-14 23:15:56,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-14 23:15:56,197 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:56,197 INFO L380 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:56,401 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:56,401 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:56,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:56,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1859945351, now seen corresponding path program 8 times [2019-10-14 23:15:56,403 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:56,403 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574878160] [2019-10-14 23:15:56,404 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:56,404 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:56,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:56,420 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:56,420 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [258075721] [2019-10-14 23:15:56,423 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:56,454 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:15:56,454 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:56,455 WARN L254 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 43 conjunts are in the unsatisfiable core [2019-10-14 23:15:56,456 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:56,597 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:56,614 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:56,615 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574878160] [2019-10-14 23:15:56,615 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:56,615 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258075721] [2019-10-14 23:15:56,615 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:56,616 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-10-14 23:15:56,616 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140519320] [2019-10-14 23:15:56,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:15:56,616 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:56,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:15:56,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:15:56,617 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 12 states. [2019-10-14 23:15:56,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:56,741 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2019-10-14 23:15:56,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:15:56,742 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2019-10-14 23:15:56,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:56,742 INFO L225 Difference]: With dead ends: 24 [2019-10-14 23:15:56,743 INFO L226 Difference]: Without dead ends: 21 [2019-10-14 23:15:56,743 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:15:56,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-14 23:15:56,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-14 23:15:56,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-14 23:15:56,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2019-10-14 23:15:56,748 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2019-10-14 23:15:56,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:56,748 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2019-10-14 23:15:56,749 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:15:56,749 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2019-10-14 23:15:56,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 23:15:56,749 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:56,749 INFO L380 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:56,954 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:56,955 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:56,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:56,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1823668560, now seen corresponding path program 9 times [2019-10-14 23:15:56,956 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:56,956 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930748173] [2019-10-14 23:15:56,957 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:56,957 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:56,957 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:56,967 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:56,968 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [938812154] [2019-10-14 23:15:56,968 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:57,017 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 23:15:57,018 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:57,019 WARN L254 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 47 conjunts are in the unsatisfiable core [2019-10-14 23:15:57,021 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:57,139 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:57,154 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:57,155 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930748173] [2019-10-14 23:15:57,155 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:57,155 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938812154] [2019-10-14 23:15:57,155 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:57,156 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-10-14 23:15:57,156 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031043216] [2019-10-14 23:15:57,156 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 23:15:57,157 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:57,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 23:15:57,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:15:57,157 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 13 states. [2019-10-14 23:15:57,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:57,347 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2019-10-14 23:15:57,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 23:15:57,347 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2019-10-14 23:15:57,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:57,348 INFO L225 Difference]: With dead ends: 25 [2019-10-14 23:15:57,348 INFO L226 Difference]: Without dead ends: 22 [2019-10-14 23:15:57,349 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:15:57,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-14 23:15:57,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-14 23:15:57,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-14 23:15:57,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2019-10-14 23:15:57,354 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2019-10-14 23:15:57,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:57,354 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2019-10-14 23:15:57,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 23:15:57,355 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2019-10-14 23:15:57,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-14 23:15:57,355 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:57,356 INFO L380 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:57,560 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:57,561 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:57,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:57,561 INFO L82 PathProgramCache]: Analyzing trace with hash 699088039, now seen corresponding path program 10 times [2019-10-14 23:15:57,562 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:57,562 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944815343] [2019-10-14 23:15:57,563 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:57,563 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:57,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:57,576 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:57,577 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [945861137] [2019-10-14 23:15:57,578 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:57,664 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:15:57,665 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:57,666 WARN L254 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 51 conjunts are in the unsatisfiable core [2019-10-14 23:15:57,668 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:57,813 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:57,835 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:57,836 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944815343] [2019-10-14 23:15:57,836 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:57,836 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945861137] [2019-10-14 23:15:57,837 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:57,837 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-10-14 23:15:57,837 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104109264] [2019-10-14 23:15:57,837 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 23:15:57,838 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:57,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 23:15:57,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:15:57,838 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 14 states. [2019-10-14 23:15:57,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:57,985 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2019-10-14 23:15:57,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 23:15:57,986 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2019-10-14 23:15:57,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:57,987 INFO L225 Difference]: With dead ends: 26 [2019-10-14 23:15:57,987 INFO L226 Difference]: Without dead ends: 23 [2019-10-14 23:15:57,988 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:15:57,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-14 23:15:57,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-14 23:15:57,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-14 23:15:57,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2019-10-14 23:15:57,995 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2019-10-14 23:15:57,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:57,996 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2019-10-14 23:15:57,996 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 23:15:57,996 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2019-10-14 23:15:57,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 23:15:57,996 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:57,997 INFO L380 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:58,200 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:58,201 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:58,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:58,202 INFO L82 PathProgramCache]: Analyzing trace with hash 196830256, now seen corresponding path program 11 times [2019-10-14 23:15:58,202 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:58,202 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956991451] [2019-10-14 23:15:58,203 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:58,203 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:58,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:58,213 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:58,213 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1702885916] [2019-10-14 23:15:58,214 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:58,252 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-10-14 23:15:58,253 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:58,254 WARN L254 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 55 conjunts are in the unsatisfiable core [2019-10-14 23:15:58,256 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:58,445 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:58,470 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:58,471 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956991451] [2019-10-14 23:15:58,471 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:58,471 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702885916] [2019-10-14 23:15:58,471 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:58,472 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-10-14 23:15:58,472 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279778457] [2019-10-14 23:15:58,472 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 23:15:58,473 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:58,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 23:15:58,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:15:58,473 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 15 states. [2019-10-14 23:15:58,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:58,670 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2019-10-14 23:15:58,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 23:15:58,671 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2019-10-14 23:15:58,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:58,672 INFO L225 Difference]: With dead ends: 27 [2019-10-14 23:15:58,672 INFO L226 Difference]: Without dead ends: 24 [2019-10-14 23:15:58,672 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:15:58,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-14 23:15:58,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-14 23:15:58,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-14 23:15:58,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2019-10-14 23:15:58,678 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2019-10-14 23:15:58,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:58,678 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2019-10-14 23:15:58,679 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 23:15:58,679 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2019-10-14 23:15:58,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 23:15:58,680 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:58,680 INFO L380 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:58,885 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:58,885 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:58,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:58,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1806708167, now seen corresponding path program 12 times [2019-10-14 23:15:58,886 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:58,887 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341079393] [2019-10-14 23:15:58,887 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:58,887 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:58,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:58,910 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:58,911 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [815954511] [2019-10-14 23:15:58,911 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:58,974 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 23:15:58,974 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:58,977 WARN L254 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2019-10-14 23:15:58,982 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:59,182 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:59,212 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:59,213 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341079393] [2019-10-14 23:15:59,213 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:59,213 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815954511] [2019-10-14 23:15:59,213 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:59,213 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-10-14 23:15:59,214 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413553329] [2019-10-14 23:15:59,214 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 23:15:59,214 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:59,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 23:15:59,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:15:59,215 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 16 states. [2019-10-14 23:15:59,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:59,420 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2019-10-14 23:15:59,421 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 23:15:59,421 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 23 [2019-10-14 23:15:59,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:59,422 INFO L225 Difference]: With dead ends: 28 [2019-10-14 23:15:59,422 INFO L226 Difference]: Without dead ends: 25 [2019-10-14 23:15:59,424 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:15:59,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-14 23:15:59,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-14 23:15:59,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-14 23:15:59,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2019-10-14 23:15:59,429 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2019-10-14 23:15:59,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:59,430 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2019-10-14 23:15:59,430 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 23:15:59,430 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2019-10-14 23:15:59,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 23:15:59,433 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:59,433 INFO L380 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:59,637 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:59,637 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:59,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:59,638 INFO L82 PathProgramCache]: Analyzing trace with hash 173315856, now seen corresponding path program 13 times [2019-10-14 23:15:59,638 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:59,638 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142110723] [2019-10-14 23:15:59,639 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:59,639 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:59,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:59,655 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:59,655 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [839577407] [2019-10-14 23:15:59,657 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:59,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:59,695 WARN L254 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 63 conjunts are in the unsatisfiable core [2019-10-14 23:15:59,696 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:59,924 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:59,980 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:59,980 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142110723] [2019-10-14 23:15:59,981 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:59,981 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839577407] [2019-10-14 23:15:59,981 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:59,981 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-10-14 23:15:59,981 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215654901] [2019-10-14 23:15:59,982 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 23:15:59,982 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:59,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 23:15:59,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:15:59,983 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 17 states. [2019-10-14 23:16:00,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:00,236 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2019-10-14 23:16:00,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 23:16:00,237 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2019-10-14 23:16:00,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:00,238 INFO L225 Difference]: With dead ends: 29 [2019-10-14 23:16:00,238 INFO L226 Difference]: Without dead ends: 26 [2019-10-14 23:16:00,239 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:16:00,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-14 23:16:00,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-14 23:16:00,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-14 23:16:00,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-10-14 23:16:00,245 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2019-10-14 23:16:00,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:00,245 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-10-14 23:16:00,245 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 23:16:00,245 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-10-14 23:16:00,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-14 23:16:00,246 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:00,246 INFO L380 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:00,449 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:00,449 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:00,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:00,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1077761767, now seen corresponding path program 14 times [2019-10-14 23:16:00,450 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:00,451 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665039797] [2019-10-14 23:16:00,451 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:00,451 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:00,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:00,462 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:00,463 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1211574099] [2019-10-14 23:16:00,463 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:00,521 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:16:00,521 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:00,523 WARN L254 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 67 conjunts are in the unsatisfiable core [2019-10-14 23:16:00,525 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:00,737 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:00,777 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:00,778 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665039797] [2019-10-14 23:16:00,778 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:00,778 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211574099] [2019-10-14 23:16:00,778 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:00,778 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-10-14 23:16:00,779 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387774323] [2019-10-14 23:16:00,779 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 23:16:00,779 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:00,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 23:16:00,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:16:00,780 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 18 states. [2019-10-14 23:16:01,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:01,053 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2019-10-14 23:16:01,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 23:16:01,054 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 25 [2019-10-14 23:16:01,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:01,056 INFO L225 Difference]: With dead ends: 30 [2019-10-14 23:16:01,056 INFO L226 Difference]: Without dead ends: 27 [2019-10-14 23:16:01,057 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:16:01,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-14 23:16:01,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-14 23:16:01,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 23:16:01,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2019-10-14 23:16:01,061 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2019-10-14 23:16:01,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:01,062 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2019-10-14 23:16:01,062 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 23:16:01,062 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2019-10-14 23:16:01,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-14 23:16:01,063 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:01,063 INFO L380 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:01,275 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:01,276 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:01,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:01,276 INFO L82 PathProgramCache]: Analyzing trace with hash -949186064, now seen corresponding path program 15 times [2019-10-14 23:16:01,277 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:01,277 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914419943] [2019-10-14 23:16:01,277 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:01,277 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:01,278 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:01,292 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:01,293 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1537109202] [2019-10-14 23:16:01,293 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:01,379 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-14 23:16:01,379 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:01,380 WARN L254 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 71 conjunts are in the unsatisfiable core [2019-10-14 23:16:01,382 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:01,604 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:01,626 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:01,626 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914419943] [2019-10-14 23:16:01,626 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:01,627 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537109202] [2019-10-14 23:16:01,627 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:01,627 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-10-14 23:16:01,627 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099816700] [2019-10-14 23:16:01,627 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 23:16:01,628 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:01,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 23:16:01,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:16:01,628 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 19 states. [2019-10-14 23:16:01,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:01,924 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2019-10-14 23:16:01,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 23:16:01,927 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 26 [2019-10-14 23:16:01,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:01,928 INFO L225 Difference]: With dead ends: 31 [2019-10-14 23:16:01,928 INFO L226 Difference]: Without dead ends: 28 [2019-10-14 23:16:01,928 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:16:01,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-14 23:16:01,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-14 23:16:01,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 23:16:01,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2019-10-14 23:16:01,938 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2019-10-14 23:16:01,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:01,938 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2019-10-14 23:16:01,938 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 23:16:01,938 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2019-10-14 23:16:01,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-14 23:16:01,939 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:01,939 INFO L380 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:02,142 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:02,143 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:02,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:02,143 INFO L82 PathProgramCache]: Analyzing trace with hash 639940615, now seen corresponding path program 16 times [2019-10-14 23:16:02,144 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:02,144 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677515203] [2019-10-14 23:16:02,144 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:02,144 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:02,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:02,154 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:02,154 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [129937844] [2019-10-14 23:16:02,155 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:02,281 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:16:02,281 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:02,282 WARN L254 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 75 conjunts are in the unsatisfiable core [2019-10-14 23:16:02,284 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:02,523 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:02,542 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:02,543 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677515203] [2019-10-14 23:16:02,543 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:02,543 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129937844] [2019-10-14 23:16:02,543 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:02,543 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-10-14 23:16:02,543 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287392836] [2019-10-14 23:16:02,544 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 23:16:02,544 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:02,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 23:16:02,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:16:02,545 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 20 states. [2019-10-14 23:16:02,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:02,843 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2019-10-14 23:16:02,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 23:16:02,844 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2019-10-14 23:16:02,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:02,844 INFO L225 Difference]: With dead ends: 32 [2019-10-14 23:16:02,844 INFO L226 Difference]: Without dead ends: 29 [2019-10-14 23:16:02,845 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:16:02,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-14 23:16:02,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-14 23:16:02,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 23:16:02,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2019-10-14 23:16:02,850 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2019-10-14 23:16:02,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:02,851 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2019-10-14 23:16:02,851 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 23:16:02,851 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2019-10-14 23:16:02,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 23:16:02,851 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:02,852 INFO L380 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:03,054 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:03,055 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:03,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:03,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1636739888, now seen corresponding path program 17 times [2019-10-14 23:16:03,056 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:03,056 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767837551] [2019-10-14 23:16:03,056 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:03,057 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:03,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:03,073 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:03,074 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1847573038] [2019-10-14 23:16:03,074 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:03,133 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-10-14 23:16:03,133 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:03,136 WARN L254 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 79 conjunts are in the unsatisfiable core [2019-10-14 23:16:03,137 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:03,390 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:03,412 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:03,413 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767837551] [2019-10-14 23:16:03,413 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:03,413 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847573038] [2019-10-14 23:16:03,413 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:03,413 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-10-14 23:16:03,414 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141822211] [2019-10-14 23:16:03,414 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 23:16:03,414 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:03,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 23:16:03,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:16:03,415 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 21 states. [2019-10-14 23:16:03,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:03,753 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2019-10-14 23:16:03,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 23:16:03,753 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 28 [2019-10-14 23:16:03,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:03,754 INFO L225 Difference]: With dead ends: 33 [2019-10-14 23:16:03,754 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 23:16:03,755 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2019-10-14 23:16:03,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 23:16:03,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-10-14 23:16:03,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-14 23:16:03,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2019-10-14 23:16:03,761 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2019-10-14 23:16:03,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:03,762 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2019-10-14 23:16:03,762 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 23:16:03,762 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2019-10-14 23:16:03,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-14 23:16:03,762 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:03,763 INFO L380 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:03,969 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:03,969 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:03,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:03,970 INFO L82 PathProgramCache]: Analyzing trace with hash 800608551, now seen corresponding path program 18 times [2019-10-14 23:16:03,970 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:03,971 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17048812] [2019-10-14 23:16:03,971 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:03,971 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:03,971 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:03,983 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:03,983 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [762253037] [2019-10-14 23:16:03,983 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:04,064 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-10-14 23:16:04,064 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:04,066 WARN L254 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 83 conjunts are in the unsatisfiable core [2019-10-14 23:16:04,068 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:04,373 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:04,402 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:04,403 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17048812] [2019-10-14 23:16:04,403 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:04,403 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762253037] [2019-10-14 23:16:04,403 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:04,403 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-10-14 23:16:04,403 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480150378] [2019-10-14 23:16:04,404 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-14 23:16:04,404 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:04,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-14 23:16:04,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2019-10-14 23:16:04,405 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 22 states. [2019-10-14 23:16:04,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:04,716 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2019-10-14 23:16:04,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-14 23:16:04,716 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 29 [2019-10-14 23:16:04,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:04,717 INFO L225 Difference]: With dead ends: 34 [2019-10-14 23:16:04,717 INFO L226 Difference]: Without dead ends: 31 [2019-10-14 23:16:04,718 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2019-10-14 23:16:04,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-14 23:16:04,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-10-14 23:16:04,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-14 23:16:04,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2019-10-14 23:16:04,723 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2019-10-14 23:16:04,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:04,724 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2019-10-14 23:16:04,724 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-14 23:16:04,724 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2019-10-14 23:16:04,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 23:16:04,724 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:04,725 INFO L380 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:04,927 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:04,928 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:04,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:04,928 INFO L82 PathProgramCache]: Analyzing trace with hash -951001168, now seen corresponding path program 19 times [2019-10-14 23:16:04,929 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:04,929 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486486853] [2019-10-14 23:16:04,929 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:04,929 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:04,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:04,939 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:04,940 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2106707346] [2019-10-14 23:16:04,940 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:04,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:04,998 WARN L254 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 87 conjunts are in the unsatisfiable core [2019-10-14 23:16:05,000 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:05,363 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:05,404 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:05,404 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486486853] [2019-10-14 23:16:05,404 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:05,404 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106707346] [2019-10-14 23:16:05,404 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:05,405 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-10-14 23:16:05,405 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036708710] [2019-10-14 23:16:05,405 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-14 23:16:05,405 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:05,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-14 23:16:05,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2019-10-14 23:16:05,406 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 23 states. [2019-10-14 23:16:05,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:05,846 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2019-10-14 23:16:05,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 23:16:05,847 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 30 [2019-10-14 23:16:05,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:05,848 INFO L225 Difference]: With dead ends: 35 [2019-10-14 23:16:05,848 INFO L226 Difference]: Without dead ends: 32 [2019-10-14 23:16:05,848 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:16:05,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-14 23:16:05,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-14 23:16:05,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 23:16:05,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2019-10-14 23:16:05,853 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2019-10-14 23:16:05,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:05,853 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2019-10-14 23:16:05,853 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-14 23:16:05,854 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2019-10-14 23:16:05,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 23:16:05,854 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:05,854 INFO L380 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:06,062 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:06,062 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:06,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:06,063 INFO L82 PathProgramCache]: Analyzing trace with hash 583672391, now seen corresponding path program 20 times [2019-10-14 23:16:06,063 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:06,064 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687453951] [2019-10-14 23:16:06,064 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:06,064 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:06,064 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:06,076 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:06,077 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [175120599] [2019-10-14 23:16:06,077 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:06,136 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:16:06,136 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:06,138 WARN L254 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 91 conjunts are in the unsatisfiable core [2019-10-14 23:16:06,139 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:06,439 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:06,465 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:06,466 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687453951] [2019-10-14 23:16:06,466 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:06,466 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175120599] [2019-10-14 23:16:06,466 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:06,466 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-10-14 23:16:06,467 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374560512] [2019-10-14 23:16:06,467 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 23:16:06,467 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:06,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 23:16:06,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:16:06,468 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 24 states. [2019-10-14 23:16:06,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:06,884 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2019-10-14 23:16:06,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 23:16:06,884 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 31 [2019-10-14 23:16:06,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:06,885 INFO L225 Difference]: With dead ends: 36 [2019-10-14 23:16:06,885 INFO L226 Difference]: Without dead ends: 33 [2019-10-14 23:16:06,886 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2019-10-14 23:16:06,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-14 23:16:06,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-10-14 23:16:06,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 23:16:06,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2019-10-14 23:16:06,892 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2019-10-14 23:16:06,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:06,893 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2019-10-14 23:16:06,893 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 23:16:06,893 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2019-10-14 23:16:06,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 23:16:06,894 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:06,895 INFO L380 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:07,108 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:07,108 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:07,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:07,109 INFO L82 PathProgramCache]: Analyzing trace with hash 913912464, now seen corresponding path program 21 times [2019-10-14 23:16:07,109 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:07,109 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432462971] [2019-10-14 23:16:07,109 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:07,110 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:07,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:07,124 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:07,124 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1149239696] [2019-10-14 23:16:07,125 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:07,359 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-10-14 23:16:07,360 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:07,362 WARN L254 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 95 conjunts are in the unsatisfiable core [2019-10-14 23:16:07,364 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:07,724 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:07,759 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:07,760 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432462971] [2019-10-14 23:16:07,760 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:07,760 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149239696] [2019-10-14 23:16:07,760 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:07,760 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-10-14 23:16:07,761 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191657994] [2019-10-14 23:16:07,761 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-14 23:16:07,761 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:07,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-14 23:16:07,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2019-10-14 23:16:07,762 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 25 states. [2019-10-14 23:16:08,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:08,164 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2019-10-14 23:16:08,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-14 23:16:08,166 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 32 [2019-10-14 23:16:08,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:08,166 INFO L225 Difference]: With dead ends: 37 [2019-10-14 23:16:08,166 INFO L226 Difference]: Without dead ends: 34 [2019-10-14 23:16:08,167 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2019-10-14 23:16:08,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-14 23:16:08,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-10-14 23:16:08,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 23:16:08,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2019-10-14 23:16:08,172 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2019-10-14 23:16:08,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:08,172 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2019-10-14 23:16:08,172 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-14 23:16:08,173 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2019-10-14 23:16:08,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-14 23:16:08,173 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:08,173 INFO L380 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:08,378 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:08,379 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:08,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:08,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1733547161, now seen corresponding path program 22 times [2019-10-14 23:16:08,380 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:08,380 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813130915] [2019-10-14 23:16:08,380 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:08,380 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:08,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:08,390 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:08,390 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [152243290] [2019-10-14 23:16:08,391 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:08,572 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:16:08,572 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:08,574 WARN L254 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 99 conjunts are in the unsatisfiable core [2019-10-14 23:16:08,575 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:08,959 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:08,985 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:08,986 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813130915] [2019-10-14 23:16:08,986 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:08,986 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152243290] [2019-10-14 23:16:08,986 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:08,986 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2019-10-14 23:16:08,987 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657782886] [2019-10-14 23:16:08,987 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-14 23:16:08,987 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:08,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-14 23:16:08,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2019-10-14 23:16:08,988 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 26 states. [2019-10-14 23:16:09,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:09,498 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2019-10-14 23:16:09,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-14 23:16:09,499 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 33 [2019-10-14 23:16:09,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:09,500 INFO L225 Difference]: With dead ends: 38 [2019-10-14 23:16:09,500 INFO L226 Difference]: Without dead ends: 35 [2019-10-14 23:16:09,501 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:16:09,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-14 23:16:09,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-10-14 23:16:09,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 23:16:09,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2019-10-14 23:16:09,506 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2019-10-14 23:16:09,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:09,507 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2019-10-14 23:16:09,507 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-14 23:16:09,507 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2019-10-14 23:16:09,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 23:16:09,507 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:09,507 INFO L380 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:09,711 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:09,711 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:09,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:09,712 INFO L82 PathProgramCache]: Analyzing trace with hash 2094550384, now seen corresponding path program 23 times [2019-10-14 23:16:09,712 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:09,712 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921553334] [2019-10-14 23:16:09,712 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:09,713 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:09,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:09,722 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:09,723 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [164270580] [2019-10-14 23:16:09,723 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:09,791 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-10-14 23:16:09,792 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:09,794 WARN L254 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 103 conjunts are in the unsatisfiable core [2019-10-14 23:16:09,795 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:10,215 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:10,242 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:10,242 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921553334] [2019-10-14 23:16:10,242 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:10,243 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164270580] [2019-10-14 23:16:10,243 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:10,243 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2019-10-14 23:16:10,243 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072139490] [2019-10-14 23:16:10,243 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 23:16:10,244 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:10,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 23:16:10,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:16:10,244 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 27 states. [2019-10-14 23:16:10,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:10,807 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2019-10-14 23:16:10,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 23:16:10,808 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 34 [2019-10-14 23:16:10,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:10,809 INFO L225 Difference]: With dead ends: 39 [2019-10-14 23:16:10,809 INFO L226 Difference]: Without dead ends: 36 [2019-10-14 23:16:10,810 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2019-10-14 23:16:10,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-14 23:16:10,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-10-14 23:16:10,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-14 23:16:10,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2019-10-14 23:16:10,818 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2019-10-14 23:16:10,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:10,819 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2019-10-14 23:16:10,819 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 23:16:10,819 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2019-10-14 23:16:10,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-14 23:16:10,820 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:10,820 INFO L380 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:11,024 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:11,025 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:11,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:11,025 INFO L82 PathProgramCache]: Analyzing trace with hash 506489991, now seen corresponding path program 24 times [2019-10-14 23:16:11,025 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:11,025 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394950672] [2019-10-14 23:16:11,025 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:11,026 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:11,026 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:11,035 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:11,035 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [723024069] [2019-10-14 23:16:11,035 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:11,126 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-14 23:16:11,126 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:11,128 WARN L254 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 107 conjunts are in the unsatisfiable core [2019-10-14 23:16:11,130 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:11,562 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:11,592 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:11,592 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394950672] [2019-10-14 23:16:11,592 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:11,592 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723024069] [2019-10-14 23:16:11,592 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:11,593 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2019-10-14 23:16:11,593 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288426539] [2019-10-14 23:16:11,593 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 23:16:11,593 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:11,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 23:16:11,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2019-10-14 23:16:11,594 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 28 states. [2019-10-14 23:16:12,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:12,179 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2019-10-14 23:16:12,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-14 23:16:12,179 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 35 [2019-10-14 23:16:12,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:12,180 INFO L225 Difference]: With dead ends: 40 [2019-10-14 23:16:12,180 INFO L226 Difference]: Without dead ends: 37 [2019-10-14 23:16:12,180 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2019-10-14 23:16:12,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-14 23:16:12,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-10-14 23:16:12,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-14 23:16:12,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2019-10-14 23:16:12,185 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2019-10-14 23:16:12,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:12,185 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2019-10-14 23:16:12,185 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 23:16:12,185 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2019-10-14 23:16:12,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-14 23:16:12,185 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:12,186 INFO L380 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:12,386 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:12,386 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:12,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:12,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1478741936, now seen corresponding path program 25 times [2019-10-14 23:16:12,387 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:12,388 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197545225] [2019-10-14 23:16:12,388 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:12,388 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:12,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:12,397 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:12,398 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [618403378] [2019-10-14 23:16:12,398 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:12,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:12,468 WARN L254 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 111 conjunts are in the unsatisfiable core [2019-10-14 23:16:12,469 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:12,880 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:12,912 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:12,912 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197545225] [2019-10-14 23:16:12,912 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:12,912 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618403378] [2019-10-14 23:16:12,913 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:12,913 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2019-10-14 23:16:12,913 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870914993] [2019-10-14 23:16:12,913 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-14 23:16:12,913 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:12,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-14 23:16:12,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2019-10-14 23:16:12,914 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 29 states. [2019-10-14 23:16:13,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:13,505 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2019-10-14 23:16:13,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-14 23:16:13,505 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 36 [2019-10-14 23:16:13,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:13,506 INFO L225 Difference]: With dead ends: 41 [2019-10-14 23:16:13,506 INFO L226 Difference]: Without dead ends: 38 [2019-10-14 23:16:13,507 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2019-10-14 23:16:13,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-14 23:16:13,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-10-14 23:16:13,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-14 23:16:13,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2019-10-14 23:16:13,512 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2019-10-14 23:16:13,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:13,513 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2019-10-14 23:16:13,513 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-14 23:16:13,513 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2019-10-14 23:16:13,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-14 23:16:13,513 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:13,514 INFO L380 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:13,717 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:13,717 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:13,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:13,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1403577767, now seen corresponding path program 26 times [2019-10-14 23:16:13,718 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:13,718 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784136337] [2019-10-14 23:16:13,718 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:13,719 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:13,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:13,728 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:13,728 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [668534656] [2019-10-14 23:16:13,728 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:13,805 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:16:13,806 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:13,808 WARN L254 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 115 conjunts are in the unsatisfiable core [2019-10-14 23:16:13,809 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:14,306 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:14,334 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:14,335 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784136337] [2019-10-14 23:16:14,335 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:14,335 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668534656] [2019-10-14 23:16:14,335 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:14,335 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2019-10-14 23:16:14,335 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2171437] [2019-10-14 23:16:14,336 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-14 23:16:14,336 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:14,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-14 23:16:14,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2019-10-14 23:16:14,336 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 30 states. [2019-10-14 23:16:14,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:14,966 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2019-10-14 23:16:14,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-14 23:16:14,966 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 37 [2019-10-14 23:16:14,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:14,967 INFO L225 Difference]: With dead ends: 42 [2019-10-14 23:16:14,967 INFO L226 Difference]: Without dead ends: 39 [2019-10-14 23:16:14,968 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2019-10-14 23:16:14,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-14 23:16:14,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-10-14 23:16:14,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-14 23:16:14,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2019-10-14 23:16:14,973 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2019-10-14 23:16:14,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:14,974 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2019-10-14 23:16:14,974 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-14 23:16:14,974 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2019-10-14 23:16:14,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-14 23:16:14,974 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:14,974 INFO L380 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:15,177 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:15,178 INFO L410 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:15,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:15,178 INFO L82 PathProgramCache]: Analyzing trace with hash 561175344, now seen corresponding path program 27 times [2019-10-14 23:16:15,179 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:15,179 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473734791] [2019-10-14 23:16:15,179 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:15,179 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:15,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:15,188 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:15,188 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1654933547] [2019-10-14 23:16:15,188 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:15,516 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-10-14 23:16:15,517 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:15,519 WARN L254 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 119 conjunts are in the unsatisfiable core [2019-10-14 23:16:15,528 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:16,019 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:16,050 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:16,050 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473734791] [2019-10-14 23:16:16,050 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:16,050 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654933547] [2019-10-14 23:16:16,050 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:16,050 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2019-10-14 23:16:16,051 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980487209] [2019-10-14 23:16:16,051 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-14 23:16:16,051 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:16,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-14 23:16:16,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2019-10-14 23:16:16,052 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 31 states. [2019-10-14 23:16:16,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:16,713 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2019-10-14 23:16:16,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-14 23:16:16,713 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 38 [2019-10-14 23:16:16,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:16,714 INFO L225 Difference]: With dead ends: 43 [2019-10-14 23:16:16,714 INFO L226 Difference]: Without dead ends: 40 [2019-10-14 23:16:16,715 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=929, Unknown=0, NotChecked=0, Total=992 [2019-10-14 23:16:16,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-14 23:16:16,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-10-14 23:16:16,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-14 23:16:16,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2019-10-14 23:16:16,721 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2019-10-14 23:16:16,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:16,721 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2019-10-14 23:16:16,721 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-14 23:16:16,721 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2019-10-14 23:16:16,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-14 23:16:16,722 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:16,722 INFO L380 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:16,926 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:16,926 INFO L410 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:16,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:16,927 INFO L82 PathProgramCache]: Analyzing trace with hash 216504007, now seen corresponding path program 28 times [2019-10-14 23:16:16,927 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:16,928 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873829247] [2019-10-14 23:16:16,928 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:16,928 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:16,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:16,937 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:16,937 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [250939463] [2019-10-14 23:16:16,937 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:17,183 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:16:17,184 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:17,186 WARN L254 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 123 conjunts are in the unsatisfiable core [2019-10-14 23:16:17,187 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:17,754 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:17,784 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:17,784 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873829247] [2019-10-14 23:16:17,784 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:17,784 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250939463] [2019-10-14 23:16:17,785 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:17,785 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2019-10-14 23:16:17,785 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123782977] [2019-10-14 23:16:17,785 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-14 23:16:17,785 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:17,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-14 23:16:17,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2019-10-14 23:16:17,786 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 32 states. [2019-10-14 23:16:18,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:18,525 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2019-10-14 23:16:18,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-14 23:16:18,525 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 39 [2019-10-14 23:16:18,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:18,526 INFO L225 Difference]: With dead ends: 44 [2019-10-14 23:16:18,526 INFO L226 Difference]: Without dead ends: 41 [2019-10-14 23:16:18,527 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 23:16:18,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-14 23:16:18,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-10-14 23:16:18,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 23:16:18,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2019-10-14 23:16:18,533 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2019-10-14 23:16:18,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:18,533 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2019-10-14 23:16:18,534 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-14 23:16:18,534 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2019-10-14 23:16:18,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-14 23:16:18,534 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:18,534 INFO L380 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:18,736 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:18,737 INFO L410 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:18,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:18,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1878372848, now seen corresponding path program 29 times [2019-10-14 23:16:18,738 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:18,738 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369438713] [2019-10-14 23:16:18,738 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:18,738 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:18,739 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:18,747 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:18,747 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1179473401] [2019-10-14 23:16:18,747 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:18,865 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-10-14 23:16:18,866 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:18,869 WARN L254 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 127 conjunts are in the unsatisfiable core [2019-10-14 23:16:18,870 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:19,427 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:19,475 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:19,476 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369438713] [2019-10-14 23:16:19,476 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:19,477 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179473401] [2019-10-14 23:16:19,477 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:19,477 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2019-10-14 23:16:19,477 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327665257] [2019-10-14 23:16:19,477 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-14 23:16:19,478 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:19,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-14 23:16:19,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 23:16:19,478 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 33 states. [2019-10-14 23:16:20,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:20,242 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2019-10-14 23:16:20,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-14 23:16:20,243 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 40 [2019-10-14 23:16:20,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:20,244 INFO L225 Difference]: With dead ends: 45 [2019-10-14 23:16:20,244 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 23:16:20,245 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 23:16:20,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 23:16:20,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-10-14 23:16:20,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-14 23:16:20,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2019-10-14 23:16:20,250 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2019-10-14 23:16:20,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:20,251 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2019-10-14 23:16:20,251 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-14 23:16:20,251 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2019-10-14 23:16:20,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-14 23:16:20,251 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:20,251 INFO L380 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:20,452 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:20,452 INFO L410 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:20,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:20,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1899921383, now seen corresponding path program 30 times [2019-10-14 23:16:20,453 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:20,453 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466996956] [2019-10-14 23:16:20,453 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:20,454 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:20,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:20,463 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:20,463 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [254216718] [2019-10-14 23:16:20,463 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:20,700 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-10-14 23:16:20,701 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:20,706 WARN L254 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 131 conjunts are in the unsatisfiable core [2019-10-14 23:16:20,707 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:21,535 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:21,567 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:21,568 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466996956] [2019-10-14 23:16:21,568 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:21,568 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254216718] [2019-10-14 23:16:21,568 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:21,568 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2019-10-14 23:16:21,568 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957802937] [2019-10-14 23:16:21,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-14 23:16:21,569 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:21,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-14 23:16:21,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 23:16:21,570 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 34 states. [2019-10-14 23:16:22,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:22,369 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2019-10-14 23:16:22,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-14 23:16:22,376 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 41 [2019-10-14 23:16:22,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:22,377 INFO L225 Difference]: With dead ends: 46 [2019-10-14 23:16:22,377 INFO L226 Difference]: Without dead ends: 43 [2019-10-14 23:16:22,377 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=69, Invalid=1121, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 23:16:22,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-14 23:16:22,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-10-14 23:16:22,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-14 23:16:22,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2019-10-14 23:16:22,382 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2019-10-14 23:16:22,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:22,382 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2019-10-14 23:16:22,382 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-14 23:16:22,382 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2019-10-14 23:16:22,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-14 23:16:22,383 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:22,383 INFO L380 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:22,587 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:22,587 INFO L410 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:22,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:22,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1232041744, now seen corresponding path program 31 times [2019-10-14 23:16:22,588 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:22,588 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081330609] [2019-10-14 23:16:22,589 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:22,589 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:22,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:22,598 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:22,598 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [877007271] [2019-10-14 23:16:22,598 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:22,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:22,696 WARN L254 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 135 conjunts are in the unsatisfiable core [2019-10-14 23:16:22,698 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:23,302 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:23,344 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:23,344 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081330609] [2019-10-14 23:16:23,344 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:23,345 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877007271] [2019-10-14 23:16:23,345 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:23,345 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2019-10-14 23:16:23,345 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258613872] [2019-10-14 23:16:23,345 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-14 23:16:23,346 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:23,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-14 23:16:23,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 23:16:23,347 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 35 states. [2019-10-14 23:16:24,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:24,199 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2019-10-14 23:16:24,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-14 23:16:24,200 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 42 [2019-10-14 23:16:24,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:24,201 INFO L225 Difference]: With dead ends: 47 [2019-10-14 23:16:24,201 INFO L226 Difference]: Without dead ends: 44 [2019-10-14 23:16:24,202 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 23:16:24,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-14 23:16:24,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-10-14 23:16:24,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 23:16:24,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2019-10-14 23:16:24,207 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2019-10-14 23:16:24,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:24,207 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2019-10-14 23:16:24,207 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-14 23:16:24,208 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2019-10-14 23:16:24,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-14 23:16:24,208 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:24,208 INFO L380 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:24,409 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:24,409 INFO L410 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:24,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:24,410 INFO L82 PathProgramCache]: Analyzing trace with hash 461349127, now seen corresponding path program 32 times [2019-10-14 23:16:24,411 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:24,411 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291049015] [2019-10-14 23:16:24,411 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:24,411 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:24,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:24,419 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:24,419 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2120057680] [2019-10-14 23:16:24,419 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:24,502 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:16:24,503 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:24,505 WARN L254 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 139 conjunts are in the unsatisfiable core [2019-10-14 23:16:24,506 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:25,187 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:25,228 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:25,228 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291049015] [2019-10-14 23:16:25,228 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:25,228 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120057680] [2019-10-14 23:16:25,228 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:25,228 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2019-10-14 23:16:25,228 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904297637] [2019-10-14 23:16:25,229 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-14 23:16:25,229 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:25,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-14 23:16:25,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 23:16:25,230 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 36 states. [2019-10-14 23:16:26,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:26,522 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2019-10-14 23:16:26,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-14 23:16:26,522 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 43 [2019-10-14 23:16:26,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:26,523 INFO L225 Difference]: With dead ends: 48 [2019-10-14 23:16:26,523 INFO L226 Difference]: Without dead ends: 45 [2019-10-14 23:16:26,525 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=1259, Unknown=0, NotChecked=0, Total=1332 [2019-10-14 23:16:26,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-14 23:16:26,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-10-14 23:16:26,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-14 23:16:26,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2019-10-14 23:16:26,529 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2019-10-14 23:16:26,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:26,529 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2019-10-14 23:16:26,530 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-14 23:16:26,530 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2019-10-14 23:16:26,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-14 23:16:26,530 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:26,530 INFO L380 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:26,733 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:26,734 INFO L410 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:26,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:26,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1416858576, now seen corresponding path program 33 times [2019-10-14 23:16:26,734 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:26,735 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926456422] [2019-10-14 23:16:26,735 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:26,735 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:26,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:26,743 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:26,743 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [52045962] [2019-10-14 23:16:26,743 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:27,442 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-10-14 23:16:27,442 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:27,445 WARN L254 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 143 conjunts are in the unsatisfiable core [2019-10-14 23:16:27,446 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:28,152 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:28,189 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:28,189 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926456422] [2019-10-14 23:16:28,189 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:28,190 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52045962] [2019-10-14 23:16:28,190 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:28,190 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2019-10-14 23:16:28,190 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388886467] [2019-10-14 23:16:28,191 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-10-14 23:16:28,191 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:28,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-10-14 23:16:28,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2019-10-14 23:16:28,192 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 37 states. [2019-10-14 23:16:29,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:29,159 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2019-10-14 23:16:29,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-10-14 23:16:29,160 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 44 [2019-10-14 23:16:29,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:29,161 INFO L225 Difference]: With dead ends: 49 [2019-10-14 23:16:29,161 INFO L226 Difference]: Without dead ends: 46 [2019-10-14 23:16:29,162 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=1331, Unknown=0, NotChecked=0, Total=1406 [2019-10-14 23:16:29,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-14 23:16:29,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-10-14 23:16:29,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-14 23:16:29,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2019-10-14 23:16:29,167 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2019-10-14 23:16:29,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:29,167 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2019-10-14 23:16:29,167 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-10-14 23:16:29,167 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2019-10-14 23:16:29,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-14 23:16:29,168 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:29,168 INFO L380 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:29,372 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:29,373 INFO L410 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:29,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:29,373 INFO L82 PathProgramCache]: Analyzing trace with hash 972880423, now seen corresponding path program 34 times [2019-10-14 23:16:29,373 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:29,374 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174903514] [2019-10-14 23:16:29,374 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:29,374 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:29,374 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:29,382 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:29,382 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1674712161] [2019-10-14 23:16:29,382 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:29,702 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:16:29,702 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:29,705 WARN L254 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 147 conjunts are in the unsatisfiable core [2019-10-14 23:16:29,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:30,449 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:30,485 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:30,486 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174903514] [2019-10-14 23:16:30,486 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:30,486 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674712161] [2019-10-14 23:16:30,486 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:30,486 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2019-10-14 23:16:30,486 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330770980] [2019-10-14 23:16:30,486 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-10-14 23:16:30,487 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:30,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-10-14 23:16:30,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2019-10-14 23:16:30,487 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 38 states. [2019-10-14 23:16:31,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:31,537 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2019-10-14 23:16:31,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-14 23:16:31,537 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 45 [2019-10-14 23:16:31,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:31,538 INFO L225 Difference]: With dead ends: 50 [2019-10-14 23:16:31,538 INFO L226 Difference]: Without dead ends: 47 [2019-10-14 23:16:31,539 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2019-10-14 23:16:31,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-14 23:16:31,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-10-14 23:16:31,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-14 23:16:31,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2019-10-14 23:16:31,544 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2019-10-14 23:16:31,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:31,544 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2019-10-14 23:16:31,544 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-10-14 23:16:31,544 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2019-10-14 23:16:31,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-14 23:16:31,545 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:31,545 INFO L380 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:31,749 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:31,749 INFO L410 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:31,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:31,750 INFO L82 PathProgramCache]: Analyzing trace with hash 94459568, now seen corresponding path program 35 times [2019-10-14 23:16:31,750 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:31,750 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706350106] [2019-10-14 23:16:31,750 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:31,751 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:31,751 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:31,759 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:31,760 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1056517306] [2019-10-14 23:16:31,760 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:31,865 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-10-14 23:16:31,865 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:31,868 WARN L254 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 151 conjunts are in the unsatisfiable core [2019-10-14 23:16:31,869 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:32,651 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:32,688 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:32,688 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706350106] [2019-10-14 23:16:32,689 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:32,689 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056517306] [2019-10-14 23:16:32,689 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:32,689 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2019-10-14 23:16:32,689 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170121612] [2019-10-14 23:16:32,689 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-14 23:16:32,689 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:32,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-14 23:16:32,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2019-10-14 23:16:32,690 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 39 states. [2019-10-14 23:16:33,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:33,799 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2019-10-14 23:16:33,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-10-14 23:16:33,799 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 46 [2019-10-14 23:16:33,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:33,800 INFO L225 Difference]: With dead ends: 51 [2019-10-14 23:16:33,800 INFO L226 Difference]: Without dead ends: 48 [2019-10-14 23:16:33,801 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=79, Invalid=1481, Unknown=0, NotChecked=0, Total=1560 [2019-10-14 23:16:33,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-14 23:16:33,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-10-14 23:16:33,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-14 23:16:33,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2019-10-14 23:16:33,805 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2019-10-14 23:16:33,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:33,805 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2019-10-14 23:16:33,805 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-10-14 23:16:33,805 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2019-10-14 23:16:33,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-14 23:16:33,806 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:33,806 INFO L380 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:34,009 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:34,010 INFO L410 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:34,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:34,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1366783161, now seen corresponding path program 36 times [2019-10-14 23:16:34,010 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:34,011 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662841678] [2019-10-14 23:16:34,011 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:34,011 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:34,011 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:34,020 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:34,020 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331175926] [2019-10-14 23:16:34,020 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:34,262 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-10-14 23:16:34,262 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:34,265 WARN L254 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 155 conjunts are in the unsatisfiable core [2019-10-14 23:16:34,266 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:35,040 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:35,082 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:35,082 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662841678] [2019-10-14 23:16:35,082 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:35,082 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331175926] [2019-10-14 23:16:35,082 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:35,082 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2019-10-14 23:16:35,083 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159761262] [2019-10-14 23:16:35,083 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-14 23:16:35,083 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:35,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-14 23:16:35,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2019-10-14 23:16:35,084 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 40 states. [2019-10-14 23:16:36,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:36,236 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2019-10-14 23:16:36,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-10-14 23:16:36,236 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 47 [2019-10-14 23:16:36,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:36,237 INFO L225 Difference]: With dead ends: 52 [2019-10-14 23:16:36,237 INFO L226 Difference]: Without dead ends: 49 [2019-10-14 23:16:36,239 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=1559, Unknown=0, NotChecked=0, Total=1640 [2019-10-14 23:16:36,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-14 23:16:36,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2019-10-14 23:16:36,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-14 23:16:36,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2019-10-14 23:16:36,244 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2019-10-14 23:16:36,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:36,244 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2019-10-14 23:16:36,244 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-14 23:16:36,244 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2019-10-14 23:16:36,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-14 23:16:36,245 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:36,245 INFO L380 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:36,448 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:36,449 INFO L410 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:36,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:36,449 INFO L82 PathProgramCache]: Analyzing trace with hash 579332496, now seen corresponding path program 37 times [2019-10-14 23:16:36,450 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:36,450 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824727707] [2019-10-14 23:16:36,450 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:36,450 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:36,450 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:36,460 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:36,460 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1163017743] [2019-10-14 23:16:36,460 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:36,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:36,619 WARN L254 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 159 conjunts are in the unsatisfiable core [2019-10-14 23:16:36,622 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:37,784 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:37,835 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:37,835 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824727707] [2019-10-14 23:16:37,835 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:37,836 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163017743] [2019-10-14 23:16:37,836 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:37,836 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2019-10-14 23:16:37,836 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137296579] [2019-10-14 23:16:37,838 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-10-14 23:16:37,838 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:37,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-10-14 23:16:37,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2019-10-14 23:16:37,842 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 41 states. [2019-10-14 23:16:38,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:38,985 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2019-10-14 23:16:38,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-10-14 23:16:38,985 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 48 [2019-10-14 23:16:38,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:38,986 INFO L225 Difference]: With dead ends: 53 [2019-10-14 23:16:38,986 INFO L226 Difference]: Without dead ends: 50 [2019-10-14 23:16:38,988 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2019-10-14 23:16:38,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-14 23:16:38,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-10-14 23:16:38,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-14 23:16:38,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2019-10-14 23:16:38,993 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2019-10-14 23:16:38,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:38,993 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2019-10-14 23:16:38,993 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-10-14 23:16:38,993 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2019-10-14 23:16:38,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-14 23:16:38,993 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:38,994 INFO L380 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:39,197 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:39,197 INFO L410 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:39,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:39,198 INFO L82 PathProgramCache]: Analyzing trace with hash 779375719, now seen corresponding path program 38 times [2019-10-14 23:16:39,198 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:39,198 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416759562] [2019-10-14 23:16:39,199 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:39,199 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:39,199 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:39,208 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:39,208 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [884355857] [2019-10-14 23:16:39,208 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:39,322 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:16:39,323 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:39,325 WARN L254 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 163 conjunts are in the unsatisfiable core [2019-10-14 23:16:39,328 INFO L279 TraceCheckSpWp]: Computing forward predicates...